<!--
    @license
    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
    Code distributed by Google as part of the polymer project is also
    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->
<x-foo></x-foo>
<script>
(function() {
  var prototype = Object.create(HTMLElement.prototype);

  prototype.createdCallback = function() {
    this.isCreated = true;
  }

  document.registerElement('x-foo', {prototype: prototype});
})();
</script>
